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zepto.picLazyLoad.min.js

zepto.picLazyLoad.min.js 1.2 KB
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  1. /**
    2. 

  2.  * Zepto picLazyLoad Plugin
    3. 

  3.  * ximan http://ons.me/484.html
    4. 

  4.  * 20140517 v1.0
    5. 

  5.  */
    6. 

  6. ;(function($){$.fn.picLazyLoad=function(settings){var $this=$(this),_winScrollTop=0,_winHeight=$(window).height();settings=$.extend({threshold:0,placeholder:'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC'},settings||{});lazyLoadPic();$(window).on('scroll',function(){_winScrollTop=$(window).scrollTop();lazyLoadPic();});function lazyLoadPic(){$this.each(function(){var $self=$(this);if($self.is('img')){if($self.attr('data-original')){var _offsetTop=$self.offset().top;if((_offsetTop-settings.threshold)<=(_winHeight+_winScrollTop)){$self.attr('src',$self.attr('data-original'));$self.removeAttr('data-original');}}}else{if($self.attr('data-original')){if($self.css('background-image')=='none'){$self.css('background-image','url('+settings.placeholder+')');}
    7. 

  7. var _offsetTop=$self.offset().top;if((_offsetTop-settings.threshold)<=(_winHeight+_winScrollTop)){$self.css('background-image','url('+$self.attr('data-original')+')');$self.removeAttr('data-original');}}}});}}})(Zepto);
    8.